ALC4082 - ASRock X870 Steel Legend

[GitHub issues - edited <github@alsa-project.org>]

alsa-project/alsa-ucm-conf issue #462 was edited from cybik:

| Following up | Relevant PR | Related issues |
| ------------------| ---------------- | ---------------- |
| https://github.com/alsa-project/alsa-ucm-conf/issues/334 | https://github.com/alsa-project/alsa-ucm-conf/pull/461 | #434 |



The card "works", but there is one feature missing - though I hesitate to call it "critical": S/PDIF / TOSLINK support is incomplete.

While sound works "fine" (ish), it's limited to 2 channels.
* Plugging in another USB device (CM106-type, for example) gives out a plethora of configuration options (per the screenshot), though this also comes with having to select the right output
* The "USB" audio outs are output-specific, which is VERY welcome, but the S/PDIF out does not allow for any advanced selection like "Supported Codecs", and the HiFi 5.1 and 7.1 do not appear to enable any IEC958/AC3 support in the background

Is there something missing in the config files to allow for such support?

![image](https://github.com/user-attachments/assets/906ea829-0210-49a8-ba16-ad1b5b1285ae)

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/462
Repository URL: https://github.com/alsa-project/alsa-ucm-conf